[INFO] updating cached repository guftall/datastructures-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/guftall/datastructures-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/guftall/datastructures-rust" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/guftall/datastructures-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/guftall/datastructures-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/guftall/datastructures-rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/guftall/datastructures-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/guftall/datastructures-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8a671c6f206ff4411a2c1a54bc4487bcdcf73c49
[INFO] sha for GitHub repo guftall/datastructures-rust: 8a671c6f206ff4411a2c1a54bc4487bcdcf73c49
[INFO] validating manifest of guftall/datastructures-rust on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of guftall/datastructures-rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing guftall/datastructures-rust
[INFO] removed path dependency bst from guftall/datastructures-rust
[INFO] finished frobbing guftall/datastructures-rust
[INFO] frobbed toml for guftall/datastructures-rust written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/guftall/datastructures-rust/Cargo.toml
[INFO] started frobbing guftall/datastructures-rust
[INFO] removed path dependency bst from guftall/datastructures-rust
[INFO] finished frobbing guftall/datastructures-rust
[INFO] frobbed toml for guftall/datastructures-rust written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/guftall/datastructures-rust/Cargo.toml
[INFO] crate guftall/datastructures-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/guftall/datastructures-rust/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking guftall/datastructures-rust against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-1/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/guftall/datastructures-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 42777108df64660f349e994c61166a463fbe844e5647d919b2189679bd93bae3
[INFO] running `"docker" "start" "-a" "42777108df64660f349e994c61166a463fbe844e5647d919b2189679bd93bae3"`
[INFO] [stderr] warning: dependency (bst) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Checking compare v0.1.0
[INFO] [stderr]     Checking bit-set v0.5.1
[INFO] [stderr]     Checking ordered_iter v0.1.1
[INFO] [stderr]     Checking bst v0.0.1
[INFO] [stderr] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:146:15
[INFO] [stderr]     |
[INFO] [stderr] 146 |         iter::order::partial_cmp(self.iter(), other.iter())
[INFO] [stderr]     |               ^^^^^ could not find `order` in `iter`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:154:15
[INFO] [stderr]     |
[INFO] [stderr] 154 |         iter::order::cmp(self.iter(), other.iter())
[INFO] [stderr]     |               ^^^^^ could not find `order` in `iter`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:102:15
[INFO] [stderr]     |
[INFO] [stderr] 102 |         iter::order::cmp(self.iter(), other.iter())
[INFO] [stderr]     |               ^^^^^ could not find `order` in `iter`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:200:5
[INFO] [stderr]     |
[INFO] [stderr] 200 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:229:5
[INFO] [stderr]     |
[INFO] [stderr] 229 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:254:5
[INFO] [stderr]     |
[INFO] [stderr] 254 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:278:5
[INFO] [stderr]     |
[INFO] [stderr] 278 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:330:5
[INFO] [stderr]     |
[INFO] [stderr] 330 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:381:5
[INFO] [stderr]     |
[INFO] [stderr] 381 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:406:5
[INFO] [stderr]     |
[INFO] [stderr] 406 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:421:5
[INFO] [stderr]     |
[INFO] [stderr] 421 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:437:5
[INFO] [stderr]     |
[INFO] [stderr] 437 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:459:5
[INFO] [stderr]     |
[INFO] [stderr] 459 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:488:5
[INFO] [stderr]     |
[INFO] [stderr] 488 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:514:5
[INFO] [stderr]     |
[INFO] [stderr] 514 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:543:5
[INFO] [stderr]     |
[INFO] [stderr] 543 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:566:5
[INFO] [stderr]     |
[INFO] [stderr] 566 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:134:5
[INFO] [stderr]     |
[INFO] [stderr] 134 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:161:5
[INFO] [stderr]     |
[INFO] [stderr] 161 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:266:5
[INFO] [stderr]     |
[INFO] [stderr] 266 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:298:5
[INFO] [stderr]     |
[INFO] [stderr] 298 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:327:5
[INFO] [stderr]     |
[INFO] [stderr] 327 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:356:5
[INFO] [stderr]     |
[INFO] [stderr] 356 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:380:5
[INFO] [stderr]     |
[INFO] [stderr] 380 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:395:5
[INFO] [stderr]     |
[INFO] [stderr] 395 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:411:5
[INFO] [stderr]     |
[INFO] [stderr] 411 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:430:5
[INFO] [stderr]     |
[INFO] [stderr] 430 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:454:5
[INFO] [stderr]     |
[INFO] [stderr] 454 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:475:5
[INFO] [stderr]     |
[INFO] [stderr] 475 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:520:5
[INFO] [stderr]     |
[INFO] [stderr] 520 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:540:5
[INFO] [stderr]     |
[INFO] [stderr] 540 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:562:5
[INFO] [stderr]     |
[INFO] [stderr] 562 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:698:1
[INFO] [stderr]     |
[INFO] [stderr] 698 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:726:1
[INFO] [stderr]     |
[INFO] [stderr] 726 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:754:1
[INFO] [stderr]     |
[INFO] [stderr] 754 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: malformed `unstable` attribute input
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:782:1
[INFO] [stderr]     |
[INFO] [stderr] 782 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:200:5
[INFO] [stderr]     |
[INFO] [stderr] 200 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:229:5
[INFO] [stderr]     |
[INFO] [stderr] 229 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:254:5
[INFO] [stderr]     |
[INFO] [stderr] 254 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:278:5
[INFO] [stderr]     |
[INFO] [stderr] 278 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:330:5
[INFO] [stderr]     |
[INFO] [stderr] 330 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:381:5
[INFO] [stderr]     |
[INFO] [stderr] 381 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:406:5
[INFO] [stderr]     |
[INFO] [stderr] 406 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:421:5
[INFO] [stderr]     |
[INFO] [stderr] 421 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:437:5
[INFO] [stderr]     |
[INFO] [stderr] 437 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:459:5
[INFO] [stderr]     |
[INFO] [stderr] 459 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:488:5
[INFO] [stderr]     |
[INFO] [stderr] 488 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:514:5
[INFO] [stderr]     |
[INFO] [stderr] 514 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:543:5
[INFO] [stderr]     |
[INFO] [stderr] 543 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:566:5
[INFO] [stderr]     |
[INFO] [stderr] 566 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:134:5
[INFO] [stderr]     |
[INFO] [stderr] 134 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:161:5
[INFO] [stderr]     |
[INFO] [stderr] 161 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:266:5
[INFO] [stderr]     |
[INFO] [stderr] 266 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:298:5
[INFO] [stderr]     |
[INFO] [stderr] 298 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:327:5
[INFO] [stderr]     |
[INFO] [stderr] 327 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:356:5
[INFO] [stderr]     |
[INFO] [stderr] 356 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:380:5
[INFO] [stderr]     |
[INFO] [stderr] 380 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:395:5
[INFO] [stderr]     |
[INFO] [stderr] 395 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:411:5
[INFO] [stderr]     |
[INFO] [stderr] 411 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:430:5
[INFO] [stderr]     |
[INFO] [stderr] 430 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:454:5
[INFO] [stderr]     |
[INFO] [stderr] 454 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:475:5
[INFO] [stderr]     |
[INFO] [stderr] 475 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:520:5
[INFO] [stderr]     |
[INFO] [stderr] 520 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:540:5
[INFO] [stderr]     |
[INFO] [stderr] 540 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:562:5
[INFO] [stderr]     |
[INFO] [stderr] 562 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:698:1
[INFO] [stderr]     |
[INFO] [stderr] 698 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:726:1
[INFO] [stderr]     |
[INFO] [stderr] 726 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:754:1
[INFO] [stderr]     |
[INFO] [stderr] 754 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: stability attributes may not be used outside of the standard library
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/set.rs:782:1
[INFO] [stderr]     |
[INFO] [stderr] 782 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0053]: method `index` has an incompatible type for trait
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     fn index(&self, i: &Q) -> &V {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter, found &Q
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `fn(&map::TreeMap<K, V, C>, Q) -> &V`
[INFO] [stderr]                found type `fn(&map::TreeMap<K, V, C>, &Q) -> &V`
[INFO] [stderr] 
[INFO] [stderr] error[E0053]: method `index_mut` has an incompatible type for trait
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bst-0.0.1/src/map.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn index_mut(&mut self, i: &Q) -> &mut V {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter, found &Q
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `fn(&mut map::TreeMap<K, V, C>, Q) -> &mut V`
[INFO] [stderr]                found type `fn(&mut map::TreeMap<K, V, C>, &Q) -> &mut V`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 73 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0053, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0053`.
[INFO] [stderr] error: Could not compile `bst`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "42777108df64660f349e994c61166a463fbe844e5647d919b2189679bd93bae3"`
[INFO] running `"docker" "rm" "-f" "42777108df64660f349e994c61166a463fbe844e5647d919b2189679bd93bae3"`
[INFO] [stdout] 42777108df64660f349e994c61166a463fbe844e5647d919b2189679bd93bae3